"Variations in colour are due to the type of gas particles that are colliding. The most common auroral colour, a pale yellowish-green, is produced by oxygen molecules located about 60 miles above the earth," the centre adds.

And while they are more common in northern territories like Yukon and Nunavut, and northern parts of provinces like Quebec and Manitoba, as you will notice in the images below, they can be visible in many Canadian cities.